<template>
  <div class="app-container">
    <el-dialog
      v-dialogDrag
      :ref="efDialogRef"
      class="efDialog"
      :width="width + 'px'"
      :title="title"
      :fullscreen="isfullscreen"
      :visible.sync="visible"
      :append-to-body="true"
      :show-close="false"
      :show="show"
      :close-on-click-modal="closeOnClickModal"
      @close="handleClose"
      :class="isminimize ? 'isminimize' : ''">
      <div
        v-show="!isminimize"
        slot="title"
        class="medium"
        @dblclick="resetFull"
      >
        <div class="lefts">
          <span>{{ title }}</span>
        </div>
        <div class="icons">
          <i
            :title="
              isfullscreen
                ? '缩小'
                : '放大'
            "
            :class="
              isfullscreen
                ? 'el-icon-copy-document'
                : 'el-icon-full-screen'
            "
            style="font-size: 24px"
            @click="IsFullscreen"
          ></i>
          <i
            title="关闭"
            class="el-icon-close"
            style="font-size: 24px"
            @click="closeDialog"
          ></i>
        </div>
      </div>
      <div v-show="isminimize" slot="title" class="horn" @dblclick="resetFull">
        <div class="lefts">
          <span>{{ title }}</span>
        </div>
        <div class="icons">
          <i
            title="放大"
            class="el-icon-top-right"
            style="font-size: 24px"
            @click="minimize"
          ></i>
        </div>
        <i
          title="关闭"
          class="el-icon-close"
          style="font-size: 24px"
          @click="closeDialog"
        ></i>
      </div>
      <div v-show="!isminimize" class="dialogBody">
        <!--        <slot name="body" solt="body">-->
        <!--        </slot>-->
        <slot solt="body">
        </slot>
      </div>
      <div v-show="!isminimize" class="dialogFooter" v-if="isFooter">
        <slot name="footer" solt="footer">
        </slot>
      </div>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      isminimize: false, // 最小化
      visible: this.show // 隐藏弹窗
    }
  },
  props: {
    closeOnClickModal: {type: Boolean, default: false},
    show: {type: Boolean, default: false},
    isfullscreen: {type: Boolean, default: false},
    title: {type: String, default: ''},
    efDialogRef: {type: String, default: 'efDialog'},
    isFooter: {type: Boolean, default: false},
    width: {type: Number, default: 1000}
  },
  methods: {
    // 最小化
    minimize() {
      this.isminimize = !this.isminimize;
      if (this.isfullscreen) this.isfullscreen = !this.isfullscreen;
    },
    // 关闭弹窗
    closeDialog() {
      this.$emit('update:show', false)
      this.$emit('update:closeOnClickModal', false)
    },
    // 全屏
    IsFullscreen() {
      this.isfullscreen = !this.isfullscreen;
      if (this.isfullscreen) this.$emit("isfullscreen");
    },
    resetFull() {
      if (this.isfullscreen === true && this.isminimize === false) {
        this.minimize();
      }
      if (this.isfullscreen === false && this.isminimize === false) {
        this.IsFullscreen();
      }
      if (this.isfullscreen === false && this.isminimize === true) {
        this.minimize();
      }
    },
    handleClose() {
      this.$emit('update:show', false)
    }
  },
  watch: {
    visible(val) {
      if (val) {
        const el = this.$refs[this.efDialogRef].$el.querySelector(".el-dialog");
        el.style.left = 0;
        el.style.top = 0;
      } else {
        this.$emit("beforeClose", val);
      }
    },
    show: {
      immediate: true,
      handler(show) {
        this.visible = this.show
      }
    }
  },
  directives: {
    dialogDrag: {
      bind(el, binding, vnode, oldVnode) {
        const dialogHeaderEl = el.querySelector(".el-dialog__header");
        const dragDom = el.querySelector(".el-dialog");
        dialogHeaderEl.style.cursor = "move";
        // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
        const sty =
          dragDom.currentStyle || window.getComputedStyle(dragDom, null);
        // const fixedX =
        // const fixedY =
        dialogHeaderEl.onmousedown = e => {
          // 判断当前是否为全屏状态
          const path =
            event.path || (event.composedPath && event.composedPath());
          const isFull = path.find(s => {
            if (s.className === undefined) {
              return false;
            } else {
              return s.className.indexOf("is-fullscreen") > -1;
            }
          });
          if (isFull !== undefined) {
            return;
          }
          const isMinix = path.find(s => {
            if (s.className === undefined) {
              return false;
            } else {
              return s.className.indexOf("isminimize") > -1;
            }
          });
          if (isMinix !== undefined) {
            return;
          }
          // 鼠标按下，计算当前元素距离可视区的距离
          const disX = e.clientX - dialogHeaderEl.offsetLeft;
          const disY = e.clientY - dialogHeaderEl.offsetTop;

          // 获取到的值带px 正则匹配替换
          let styL, styT;

          // 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
          if (sty.left.includes("%")) {
            styL =
              +document.body.clientWidth * (+sty.left.replace(/\%/g, "") / 100);
            styT =
              +document.body.clientHeight * (+sty.top.replace(/\%/g, "") / 100);
          } else {
            styL = +sty.left.replace("px", "");
            styT = +sty.top.replace("px", "");
          }

          document.onmousemove = function (e) {
            // 通过事件委托，计算移动的距离
            const l = e.clientX - disX;
            const t = e.clientY - disY;
            // 移动当前元素
            dragDom.style.left = `${l + styL}px`;
            dragDom.style.top = `${t + styT}px`;
            const dom = e.path.find(s => s.querySelector('.el-dialog')).children[0]

            if (dom.offsetTop < 0) {
              dragDom.style.top = `0px`
            }
            if (dom.offsetLeft < 0) {
              dragDom.style.left = `0px`
            }

            // 将此时的位置传出去
            // binding.value({x:e.pageX,y:e.pageY})
          };

          document.onmouseup = function (e) {
            const dragDom = el.querySelector(".el-dialog");
            const offsetLeft = dragDom.offsetLeft;
            const offsetTop = dragDom.offsetTop;
            const left = Number(dragDom.style.left.replace("px", ""));
            const top = Number(dragDom.style.top.replace("px", ""));
            const windowWidth = window.innerWidth;
            const windowHeight = window.innerHeight - 50;
            const offsetRight = offsetLeft + dragDom.offsetWidth - windowWidth;
            const offsetBottom =
              offsetTop + dragDom.offsetHeight - windowHeight;
            if (offsetLeft < 0) {
              dragDom.style.left = left - offsetLeft + "px";
            }
            if (offsetTop < 0) {
              dragDom.style.top = top - offsetTop + "px";
            }
            if (offsetRight > 0) {
              dragDom.style.left = left - offsetRight + "px";
            }
            if (offsetBottom > 0) {
              dragDom.style.top = top - offsetBottom + "px";
            }
            document.onmousemove = null;
            document.onmouseup = null;
          };
        };
      }
    }
  }
};
</script>
<style lang="scss">

.no_select {
  -webkit-touch-callout: none; /* iOS Safari */
  -webkit-user-select: none; /* Chrome/Safari/Opera */
  -khtml-user-select: none; /* Konqueror */
  -moz-user-select: none; /* Firefox */
  -ms-user-select: none; /* Internet Explorer/Edge */
  user-select: none; /* Non-prefixed version, currently */
}

.isminimize {
  left: 20px;
  bottom: 20px;
  top: auto;
  right: auto;
  overflow: hidden;

  .el-dialog {
    margin: 0 !important;
    width: 240px !important;
    height: 40px;
    top: 0 !important;
    left: 0 !important;
  }

  .el-dialog__header {
    cursor: auto !important;

    .el-dialog__headerbtn {
      display: none;
    }
  }

  .dialogFooter {
    position: absolute;
    bottom: 0;
  }
}

.efDialog {

  .is-fullscreen {
    width: 100% !important;
    left: 0 !important;
    top: 0 !important;
    margin-top: 0 !important;
    overflow: hidden;
    position: relative;

    .el-dialog__header {
      cursor: auto !important;
    }

    .el-dialog__body {
      height: 100%;
      padding: 0px !important;

      .dialogBody {
        height: 100% !important;
        max-height: none !important;
        padding-bottom: 120px !important;
      }
    }

    .dialogFooter {
      position: absolute;
      bottom: 0;
      width: 100%;
      background: #fff;
    }
  }

  .el-dialog {
    border-radius: 10px;
    .el-dialog__header {
      width: 100%;
      padding: 10px 20px 10px !important;
      display: flex;
      /*border-bottom: 1px solid #ccc;*/
      @extend .no_select;
      cursor: auto;

      .medium {
        width: 100%;
        height: 100%;
        display: flex;

        div {
          flex: 1;
        }

        .lefts {

          span {
            text-align: left;
            color: #333;
            line-height: 24px;
            font-weight: 700;
          }
        }

        .icons {
          display: flex;
          justify-content: flex-end;

          i {
            color: #5f6368;
            font-size: 18px !important;
            display: block;
            padding: 3px;
          }

          i:hover {
            //color: #dcdfe6;
            font-weight: 700;
            cursor: pointer;
          }

          .el-icon-close:hover {
            //color: #f00;
            font-weight: 700;
          }
        }
      }

      .horn {
        width: 100%;
        height: 100%;
        display: flex;
        justify-content: space-between;

        div {
          i {
            color: #5f6368;
            font-size: 20px !important;
          }
        }

        .lefts {
          flex: 4;
          overflow: hidden;
          text-overflow: ellipsis;
          white-space: nowrap;

          span {
            font-size: 16px;
            color: #606266;
          }
        }

        .icons {
          display: flex;
          justify-content: flex-end;

          i {
            color: #5f6368;
            font-size: 18px !important;
            display: block;
            padding: 3px;
          }

          i:hover {
            cursor: pointer;
          }

          .el-icon-close:hover {
            color: #fff;
          }
        }

        // .centers {
        //   flex: 1;
        // }
        // .rights {
        //   flex: 1;
        // }
        i:hover {
          cursor: pointer;
          color: #000;
        }
      }

      .el-dialog__headerbtn {
        top: 0;
        font-size: 24px;
      }
    }

    .el-dialog__body {
      padding: 0px !important;

      .dialogBody {
        max-height: calc(80vh - 50px);
        // box-shadow: inset 0px -2px 10px 1px #b0b3b2;
        overflow: auto;
        padding: 20px 20px 0px;

        &::-webkit-scrollbar {
          width: 4px;
          height: 8px;
        }

        &::-webkit-scrollbar-thumb {
          background: transparent;
          border-radius: 5px;
        }

        &:hover::-webkit-scrollbar-thumb {
          background: hsla(0, 0%, 53%, 0.4);
        }

        &:hover::-webkit-scrollbar-track {
          background: hsla(0, 0%, 53%, 0.1);
        }
      }

      .dialogFooter {
        padding: 10px 15px;
        /*border-top: 1px solid #ccc;*/
        text-align: right;

        .el-button {
          padding: 7px 15px;
        }
      }
    }
  }

  .efDialog {
    // display: flex;
    // justify-content: center;
    .el-select {
      width: 100%;
    }

    .el-date-editor {
      width: 100%;
    }
  }
}
</style>
